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Special Core Analysis (RES14)


    This course covers the steps in assessing results contained in special core analysis reports, and in particular those from relative permeability tests. This includes how to: (a) review laboratory reports, (b) assess the procedures used and (c) make refinements before use in reservoir simulation studies.
    While the course focuses on relative permeability, capillary pressure concepts are also discussed. The link between relative permeability and rock type is illustrated. The course contains information that can be used to define relative permeability relationships when reliable laboratory results are not available.

    Course Level: Skill
    Instructor: Jess Stiles

    Designed for you, if you are...

    • A reservoir engineer involved with reservoir simulation and / or classical hand calculations
    • A supervisor or manager who reviews simulation results carried out by others
    • Laboratory personnel involved with SCAL measurements who wants to learn how your results are used and gain insights into how laboratory programmes might be improved
    • A production geologist or petrophysicist working in an integrated team as it will help you select samples for analysis and assist in relating relative permeability and capillary pressure to rock type

    How we build your confidence

    • The course covers such topics as coring operations and core preservation techniques. Laboratory measurement methods are also addressed, since results are affected by the techniques used and the test conditions
    • Reported results that were determined using acceptable laboratory procedures require adjustment or refinement, and an understanding of the strengths and weaknesses associated with the various testing methods is needed in doing this. The reasons that the results from steady-state and unsteady-state waterflooding tests are different is explained in this way
    • Using a comprehensive manual as reference, which includes numerous examples from the North Sea and elsewhere in the world
    • Delegates will work with a range of practical exercises including
      - Analysis and refinement of water-oil relative permeability data
      - Analysis and refinement of gas-oil relative permeability data
      - Analysis and use of primary drainage capillary pressure data
      - Identifying intervals with different rock types from routine core analysis data

    The benefits from attending

    By the end of the course you will feel confident in your understanding of how to:

    • Carry out a systematic review of a laboratory report and distinguish results that are clearly invalid from those that may be reliable
    • Define the strengths and weaknesses of the various laboratory measurement techniques and identify which portions of reported relative permeability curves are likely to require refinement
    • Analyse and evaluate reported relative permeability curves and make necessary adjustments and refinements
    • Relate relative permeability results to rock types
    • Formulate a special core analysis program for a new well or field


    • Uses and importance of accurate special core analysis results in reservoir engineering calculations
    • Key - challenges in using results
    • Validating SCAL data
      - What to look for during review of SCAL reports
      - A systematic approach to data validation
      - Review checklists
    • Wettability
      - Wettability concepts and measurement techniques
      - Types of wettability
      - Factors which effect reservoir wettability and how natural wettability can inadvertently be altered during core handling
      - Wettability restoration
    • Using of capillary pressure to define connate water saturation
      - Measurement techniques
      - Systematic analysis of results
      - Adjusting laboratory data to reservoir conditions
      - Relating capillary pressure data to height above original oil-water contact
    • Water-oil relative permeability
      - Measurement methods and techniques
      - Wettability considerations
      - Importance of test procedures and test conditions
      - Special problems with intermediate wettability reservoirs
      - Refining laboratory results. Integrating, grouping and averaging
      - Hysteresis in water-oil relative permeability
    • Gas-oil relative permeability
      - Measurement techniques
      - Differences between gas-oil and water-oil data
      - Critical gas saturation
      - Efficient gravity drainage mechanism and extending oil relative permeability curves
    • Reservoir characterisation
      - Examples of relationships between relative permeability and other rock characteristics
      - Characterisation techniques for differentiating rock types and assigning results to those rock types
    • Residual oil saturation
      - Ambiguity and alternative definitions
      - Difficulties in determining
      - Estimating from relative permeability data
      - Effect of wettability

    Customer Feedback

    "The presenter is able to explain complex phenomena in an easy way." - Snr. Reservoir Engineer at Schlumberger Oilfield Eastern Ltd
    "Very good explanation about the basic and practical application of rel-perm" - Reservoir Engineer at Wintershall
    "Comprehensive approach to handle SCAL report review and integration of the experimental data to get reliable rel. perm. curves" - Reservoir Engineer at ADCO




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